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DNA-modified metal organic framework film and preparation method and application thereof

A metal organic framework, thin film technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of limited development and application, cumbersome operation, pollution, etc., achieve low energy consumption, weaken transmembrane diffusion, operation simple effect

Inactive Publication Date: 2017-07-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is often a complex organic synthesis reaction, with cumbersome operations, high energy consumption, and pollution, which limit its development and application.

Method used

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  • DNA-modified metal organic framework film and preparation method and application thereof
  • DNA-modified metal organic framework film and preparation method and application thereof
  • DNA-modified metal organic framework film and preparation method and application thereof

Examples

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preparation example Construction

[0031] The preparation method of copper hydroxide nanowire solution among the present invention is:

[0032] Add the ethanolamine aqueous solution into the copper nitrate aqueous solution, stir, and seal the reaction vessel, and obtain a copper hydroxide nanowire solution after 12 to 48 hours. The concentration of the ethanolamine aqueous solution is 1.4mM; the concentration of the copper nitrate aqueous solution is 4mM.

[0033] The preparation method of zinc hydroxide nanowire solution among the present invention is:

[0034] Add ethanolamine to the mixed solution of ethanol and water to obtain ethanolamine solution; add zinc nitrate to the mixed solution of ethanol and water to obtain zinc nitrate solution; then mix the ethanolamine solution and zinc nitrate solution, stir, and seal the reaction vessel, After 0.5-1.5 hours, a zinc hydroxide nanowire solution is obtained. The concentration of the ethanolamine solution is 1.6mM; the concentration of the zinc nitrate solutio...

Embodiment 1

[0037] 1) Mix 30ml copper hydroxide nanowire solution with 1ml 110mg / L DNA solution, stir magnetically for 5 minutes, and vacuum filter directly on the anodized aluminum porous membrane to form a composite membrane of nanowires and DNA, and the anodized aluminum is porous The diameter of the membrane is 2.5 cm, the pore diameter is 200 nm, and the porosity is 50%. ;

[0038] 2) Put the nanowire DNA film into 10ml, 10mM trimesic acid solution (the volume of ethanol and water is 1:1), and react at room temperature for 2 hours. After the reaction, wash 3 times with the mixed solvent of the same ratio to obtain a DNA-modified HKUST-1 film, see figure 2 . figure 2 The DNA-modified HKUST-1 film shown is a polycrystalline film with good grain intergrowth and continuous film without cracks.

Embodiment 2

[0040]1) Mix 30ml copper hydroxide nanowire solution with 1ml 110mg / L DNA solution, stir magnetically for 5 minutes, and vacuum filter directly on the anodized aluminum porous membrane to form a composite membrane of nanowires and DNA, and the anodized aluminum is porous The diameter of the membrane is 2.5 cm, the pore diameter is 200 nm, and the porosity is 50%. ;

[0041] 2) Put the nanowire DNA film into 10ml, 10mM trimesic acid solution (the volume of ethanol and water is 1:1), and react at room temperature for 2 hours. After the reaction, wash 3 times with the mixed solvent of the same ratio to obtain a DNA-modified HKUST-1 film, see image 3 . image 3 The DNA-modified HKUST-1 film shown is a polycrystalline film with good grain intergrowth and continuous film without cracks.

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Abstract

The invention discloses a DNA-modified metal organic framework film, and a preparation method and proton conduction application thereof. The preparation method comprises the following steps: (1) preparing a hydroxide nanowire solution, then mixing the prepared hydroxide nanowire solution and a DNA solution, uniformly stirring, and performing vacuum filtering to obtain a composite film of hydroxide nanowire and DNA; (2) dissolving organic ligands in a mixed solution of ethanol and water to obtain an organic ligand solution, placing the composite film of the hydroxide nanowire and the DNA into the organic ligand solution, reacting for 2 to 24 hours at room temperature to obtain the DNA-modified metal organic framework film. By virtue of the preparation method, the DNA is mixed with the nanowire by virtue of physical stirring and electrostatic adsorption, the DNA is in-situ introduced into the metal organic framework film so as to modify the metal organic framework film, so that an organic modification process of the metal organic framework ligand is avoided, the energy consumption is low, the pollution is avoided, and rapidness and high efficiency can be achieved. A dimension of a passage entrance of a metal organic framework is equivalent to a methanol molecule, so that the transmembrane dispersion of the methanol molecules can be effectively weakened.

Description

technical field [0001] The invention relates to a preparation method of a metal-organic framework film, in particular to a DNA-modified metal-organic framework film and an application thereof. Background technique [0002] Metal-organic framework film is a porous functional film with a thickness ranging from nanometer to micron and attached to the substrate. Ideally, the metal-organic framework film has a smooth surface, isotropic, high porosity and good chemical stability. It can be used in many fields such as separation, adsorption, catalysis, drug sustained release carrier, hydrogen storage, etc. [0003] Dense continuous metal-organic framework films can be used in the field of ion separation. If the modification of the micropore inner wall of the metal organic framework film can change the affinity of the inner wall to ions, by introducing different functional groups, the modification of the micropore inner wall is likely to realize the conduction of protons, and the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D69/12B01D69/02B01D67/00
CPCB01D71/82B01D67/0006B01D69/02B01D69/12B01D2325/36
Inventor 彭新生郭弈卢浩天
Owner ZHEJIANG UNIV